论文标题
彩色噪声时间序列作为适合人造进化系统环境变化的模型
Coloured noise time series as appropriate models for environmental variation in artificial evolutionary systems
论文作者
论文摘要
生态，环境和地球物理时间序列始终表现出有色（1/f^\ b {eta}）噪声的特征。在这里，我们在引入彩色噪声作为人工进化系统环境变化的适当模型之前，简要调查了彩色噪声，种群持久性和相关进化动力学的文献。为了说明和探索不同噪声颜色的效果，应用了一个简单的进化模型，该模型研究了在波动环境中专业和通用之间权衡的权衡。该模型的结果清楚地表明，随着环境变异性变为“白色”，随着环境变异性变为“红色”而受到青睐，对环境变异性变为“白色”。粉红色的噪声位于白色和红色噪声之间的中途，被证明是通用和专业平衡压力的重点，可以洞悉为什么越来越多地将“粉红色”噪声视为典型环境变异性的适当模型。我们继续讨论此处介绍的结果是如何进一步讨论了对波动环境的进化响应的更广泛讨论。最终，我们认为，作为一个领域的人工生命应包含使用有色噪声来产生环境变异性模型的使用。
Ecological, environmental and geophysical time series consistently exhibit the characteristics of coloured (1/f^\b{eta}) noise. Here we briefly survey the literature on coloured noise, population persistence and related evolutionary dynamics, before introducing coloured noise as an appropriate model for environmental variation in artificial evolutionary systems. To illustrate and explore the effects of different noise colours, a simple evolutionary model that examines the trade-off between specialism and generalism in fluctuating environments is applied. The results of the model clearly demonstrate a need for greater generalism as environmental variability becomes `whiter', whilst specialisation is favoured as environmental variability becomes `redder'. Pink noise, sitting midway between white and red noise, is shown to be the point at which the pressures for generalism and specialism balance, providing some insight in to why `pinker' noise is increasingly being seen as an appropriate model of typical environmental variability. We go on to discuss how the results presented here feed in to a wider discussion on evolutionary responses to fluctuating environments. Ultimately we argue that Artificial Life as a field should embrace the use of coloured noise to produce models of environmental variability.
